MPD: pcm/ChannelsConverter.hxx Source File

MPD 0.20.15

ChannelsConverter.hxx
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1 /*
2 * Copyright 2003-2017 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #ifndef MPD_PCM_CHANNELS_CONVERTER_HXX
21 #define MPD_PCM_CHANNELS_CONVERTER_HXX
22
23 #include "check.h"
24 #include "SampleFormat.hxx"
25 #include "PcmBuffer.hxx"
26
27 #ifndef NDEBUG
28 #include <assert.h>
29 #endif
30
31 template<typename T> struct ConstBuffer;
32
36 class PcmChannelsConverter {
37 SampleFormat format;
38 unsigned src_channels, dest_channels;
39
40 PcmBuffer buffer;
41
42 public:
43 #ifndef NDEBUG
44 PcmChannelsConverter()
45 :format(SampleFormat::UNDEFINED) {}
46
47 ~PcmChannelsConverter() {
48 assert(format == SampleFormat::UNDEFINED);
49 }
50 #endif
51
61 void Open(SampleFormat format,
62 unsigned src_channels, unsigned dest_channels);
63
67 void Close();
68
77 gcc_pure
78 ConstBuffer<void> Convert(ConstBuffer<void> src) noexcept;
79 };
80
81 #endif
check.h
ConstBuffer< void >
Definition: ConstBuffer.hxx:45
PcmChannelsConverter::~PcmChannelsConverter
~PcmChannelsConverter()
Definition: ChannelsConverter.hxx:47
PcmBuffer.hxx
PcmChannelsConverter::Convert
gcc_pure ConstBuffer< void > Convert(ConstBuffer< void > src) noexcept
Convert a block of PCM data.
PcmBuffer
Manager for a temporary buffer which grows as needed.
Definition: PcmBuffer.hxx:33
PcmChannelsConverter::PcmChannelsConverter
PcmChannelsConverter()
Definition: ChannelsConverter.hxx:44
SampleFormat
SampleFormat
Definition: SampleFormat.hxx:33
SampleFormat.hxx
ConstBuffer
A reference to a memory area that is read-only.
Definition: FlacPcm.hxx:29
PcmChannelsConverter::Open
void Open(SampleFormat format, unsigned src_channels, unsigned dest_channels)
Opens the object, prepare for Convert().
SampleFormat::UNDEFINED
gcc_pure
#define gcc_pure
Definition: Compiler.h:116
PcmChannelsConverter
A class that converts samples from one format to another.
Definition: ChannelsConverter.hxx:36
PcmChannelsConverter::Close
void Close()
Closes the object.